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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles

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Alberta
.275 member

Reged: 03/12/07
Posts: 66
Loc: Canada

Any one know how to calculate recoil energy?
#177385 - 19/03/11 12:24 PM

I would like to calculate out what kind of recoil ft/lbs my rifle is producing and at what rearward velocity.

I am shooting a 9.8LB rifle with 97g of powder and 400g bullets at 2510fps.

What I did was load up my 416 Rigby (Ruger RSM) untill I could not take it any more to find my limit. This is a bit more recoil than I feel I could or should regularly take. The reason I would like to know the numbers is I am planning on buying a double and want to be sure I am not going to go into silliness in the recoil department.

I know that there are many factors in "felt" recoil such as stock design, bbl weight and length but I would just like to get an idea of the actual calculated recoil. Then compare it to things like the 470, 450-400, 500-416, even the 500 at the usual weights these guns are made at. It's not perfect science but fun none the less.

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pinotguy
.275 member

Reged: 03/02/07
Posts: 57
Loc: CO

Re: Any one know how to calculate recoil energy? [Re: Alberta]
#177386 - 19/03/11 12:58 PM

Here's a link for recoil calculation - http://www.beartoothbullets.com/rescources/calculators/php/recoil.htm

For the numbers you've listed, you're looking at around 66 ft. lbs. @ 21 FPS. Fairly stout, I'd say.

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eagle27
.400 member

Reged: 24/01/09
Posts: 1165
Loc: Rolleston, Christchurch, New Z...

Re: Any one know how to calculate recoil energy? [Re: Alberta]
#177387 - 19/03/11 01:06 PM

By my calculations your rifle will recoil at 21.3fps with an energy of 69ftlbs

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eagle27
.400 member

Reged: 24/01/09
Posts: 1165
Loc: Rolleston, Christchurch, New Z...

Re: Any one know how to calculate recoil energy? [Re: eagle27]
#177394 - 19/03/11 02:03 PM

pinotguy, you beat me by a few minutes while I was writing an excel formula for the recoil velocity and energy for a gun.

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NitroX
.700 member

Reged: 25/12/02
Posts: 39889
Loc: Barossa Valley, South Australi...

Re: Any one know how to calculate recoil energy? [Re: eagle27]
#177396 - 19/03/11 02:12 PM

I've used the beartooth online calculator in the past too.

I would LOVE to put some of these formulae up on NE as online calculators too.

Anyone know how to do it?

--------------------
John aka NitroX

...
Govt get out of our lives NOW!
"I love the smell of cordite in the morning."
"A Sharp spear needs no polish"

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DarylS
.700 member

Reged: 10/08/05
Posts: 27005
Loc: Beautiful British Columbia, Ca...

Re: Any one know how to calculate recoil energy? [Re: NitroX]
#177440 - 20/03/11 11:03 AM

That's pretty cool with the Bear-tooth formula - My 14 bore rb gun somes out at 50 foot pounds recoil, at 19fps speed.

the .375/06IMp comes out at 39foot pounds at 17fps.

--------------------
Daryl

"a gun without hammers is like a Spaniel without ears" King George V

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Alberta
.275 member

Reged: 03/12/07
Posts: 66
Loc: Canada

Re: Any one know how to calculate recoil energy? [Re: pinotguy]
#177444 - 20/03/11 12:08 PM

Quote:

Here's a link for recoil calculation - http://www.beartoothbullets.com/rescources/calculators/php/recoil.htm

For the numbers you've listed, you're looking at around 66 ft. lbs. @ 21 FPS. Fairly stout, I'd say.

Thanx for that. It is easy to use and perfect for messing around.

I am also trying to develop a very low recoiling 7-08 load for a kid's gun, and this is great for that job too. Trying to get it down to about 243 type recoil, looks possible.

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VonGruff
.400 member

Reged: 08/02/09
Posts: 1119
Loc: South Otago, New Zealand.

Re: Any one know how to calculate recoil energy? [Re: Alberta]
#177484 - 21/03/11 06:08 AM

Here is the one I use for recoil.
http://www.huntamerica.com/recoil_calculator/

Exterior Balistics
http://biggameinfo.com/index.aspx?page=/balcalc.ascx

Terminal Balistics pages
http://www.rathcoombe.net/sci-tech/ballistics/wounding.html

Von Gruff.

--------------------
Von Gruff.

Exodus 20:1-17

Acts 4:10-12

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chuck375
.333 member

Reged: 13/10/07
Posts: 445
Loc: Colorado Springs CO

Re: Any one know how to calculate recoil energy? [Re: VonGruff]
#177784 - 28/03/11 10:43 AM

I regularly use these:

recoil:

http://www.handloads.com/calc/recoil.asp

kinetic energy and TKO values:

http://www.handloads.com/calc/quick.asp

ballistic calculator:

http://www.biggameinfo.com/BalCalc.aspx

--------------------
"There's a saying in prize fighting: Everyone's got a plan until they get hit"

Michael Douglas "The Ghost And The Darkness"

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bigdog
.375 member

Reged: 05/02/06
Posts: 559
Loc: Southern Illinois

Re: Any one know how to calculate recoil energy? [Re: chuck375]
#180295 - 29/04/11 02:49 PM

If you just have a calculator with you and no computer bullet weight in grains x velocity in ft per second x velocity in ft. per second all divided by 450,300 this gives you energy in ft.lbs.

--------------------
Kyle, I love you buddy, Dad

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